Volcanoes - Created early atmosphere, Early atmosphere - Carbon dioxide and water vapour, Methane and ammonia - Other gases in early atmosphere, Condensed - Earth cooled and water vapour turned back into liquid (oceans), Dissolved - Carbon dioxide dissolved in the sea and went into animal shells, Evolved - Green plants evolved, Photosynthesis - Plants take in carbon dioxide and give out oxygen, Oxygen - Relights a glowing splint, Greenhouse effect - Gases absorb heat given off by Earth which traps it making Earth heat up, Greenhouse gases - Carbon dioxide, methane, water vapour, Correlation - A link between two variables e.g. as carbon dioxide goes up, temperature goes up, Variable - Something that can be changed, Carbon dioxide sources - Respiration, combustion, Uncertainty - Not being sure about values e.g. we can’t be sure how hot the Earth was 100,000 years ago, Methane sources - Farts from cows, Efficient - Less wasted energy, this means we can burn less fuel and make less carbon dioxide, Renewable resources - e.g. wind farm  no carbon dioxide given off making electricity,

CC17 FT Atmosphere

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